Alternately operated walking bars for extracting an ingot from a curved mold



Nov. 25, 1969 v, A. BYKOV ET AL 3,480,074

ALTERNATELY OPERATED WAL. G 8 FOR EXTRACTING AN INGOT FROM URVE MOLD Filed March 6, 1967 2 Sheets-Sheet 1 Nov. 25, 1969 ov ET AL 3,480,074

ALTERNATELY OPERATED WALKING BARS FOR EXTRACTING AN INGOT FROM A CURVED MOLD 2 Sheets-Sheet 2 Filed March 6, 1967 United States Patent Office 3,480,074 Patented Nov. 25, 1969 Ul. Kultury 16, kv. 69; and Georgy Lukich Khimich,

Ul. Lenina 53, kv. 92, all of Sverdlovsk, U.S.S.R.

Filed Mar. 6, 1967, Ser. No. 621,029 Int. Cl. B22d 29/00 US. Cl. 164-282 3 Claims ABSTRACT OF THE DISCLOSURE A device for drawing an ingot out of a continuous casting machine having sets of alternately operated walking bars on each side of the ingot, the walking bars moving in the direction of drawing of the ingot when in contact therewith and moving in the contrary direction when withdrawn from contact, the device including cam means to cause movement of the walking bars parallel to the drawing direction and cam operated lever and crank means to move the bars toward and away from the ingOt.

The present invention relates to devices for extracting an ingot from a curved mold of continuous casting plants, and more specifically to devices for extracting such ingots where curved walking bars or blocks of such bars are employed.

Devices for extracting an ingot from a curved mold are known, comprising two blocks of walking curvilinear bars, the displacement thereof along the axis of the ingot being effected by driving cams, while the clamping of the ingot by means of bars and their withdrawal therefrom is accomplished by connecting rods and driving crankshafts.

The principal disadvantage of the existing devices is the presence of two drives, one of which is designed to carry into effect the reciprocal motion of the bars along the axis of the ingot, while the other effects the clamping of the ingot by the bars and their withdrawal therefrom.

It is difficult to ensure the synchronous operation of the above-mentioned drives. As a result, the process of withdrawal of the ingot may be interrupted.

An object of the present invention is to provide a device for extracting an ingot, said device permitting the operation of the mechanism for movement of the bars to be synchronized with the operation of the driving crankshafts of said bars.

Another object of the present invention is to provide a device for extracting to ingot, which is reliable in operation and simple in design.

These and other objects of the invention are achieved due to the fact that the device for extracting the ingot from the curved mold comprises two blocks of walking bars of curvilinear shape whose displacement is car-tied into effect by driving cams, while the operations of clamping the ingot by the bars and their withdrawal therefrom are effected by means of connecting rods and driving crankshafts. The present device is provided with additional cams mounted on the common shaft with the driving cams, while the crankshafts are driven by the same additional cams through a system of connecting rods and levers.

To vary the distance between the bars, it is expedient that the connecting rods of the system are made adjustable as to their length.

It is necessary to equip the levers, interacting with the additional cams, with hydraulic cylinders.

The nature of the present invention will be more fully apparent from a consideration of the following description of an exemplary embodiment thereof, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a general view, supporting elements being omitted for clarity, of the device for extracting an ingot of the present invention;

FIG. 2 is a kinematic diagram of the same device for extracting an ingot with lower curvilinear bars, according to the present invention, the upper bars not being shown.

The device for extracting an ingot from the curved mold comprises a plurality of blocks 1, 1' and 2, 2 (FIGS. 1 and 2) of curved bars complete with driving cams 3 and 4 and driving crankshafts 5, 6, 7 and 8; two additional cams 9 and 10 connected to said shafts through a system of connecting rods 11, 12, 13 and 14, and levers 15, 16, 17, 18, 19 and 20. The crankshafts are passed through the lower blocks 1 and 2 and are connected to the upper blocks 1' and 2' to eliminate longitudinal displacement of the upper bars relative to the lower ones.

The cams 3, 4, 9 and 10 are mounted on the common shaft 21, which is driven by an electric motor 22 through a reduction gear 23. The cams 4 are turned with regard to the cam 3 through an angle of and these cams are intended for effecting the reciprocal motion of the blocks 1, 1' and 2, 2' of the walking curved bars along the axis of the solidifying ingot.

The cams 9 and 10 are also turned relative to each other through an angle of 180 and they are intended to drive the crankshafts 5-8 through a system of connecting rods 11-14 and levers 1520 which results in their alternate clamping of the ingot by the bars and their withdrawal therefrom.

To overcome the force produced by the ferrostatic pressure of the liquid phase of the ingot, affecting the bars when clamping the ingot, hydraulic cylinders 24 and 25 are provided for actuating the cams 9 and 10 through rollers 26 and 27 of the levers 15 and 18.

The connecting rods 11 through 14 are made adjustable as to their length, each comprising two parts that are interconnected by screw tie rods 28, 29, 30 and 31. Such a design of the connecting rods allows changing the distance between the working surfaces of the walking bars.

The device operates as follows:

The block 1, 1' (FIG. 2) of the walking curved bars is moved by means of a cam 9 to bring the bars into contact with the ingot being cast so that the working surfaces of the bars touch the broad faces of the ingot.

When the electric motor 22 is actuated, the blocks 1, 1' of the device are made to move by the cam 4 at a uniform speed, equal to the speed of extraction of the ingot, and thus the ingot is pulled from the molds at this step.

The cam 10, through the system of rods 13 and 14, and levers 18, 19 and 20, effects the turning of crankshafts 6 and 8, whereby due to the fact that the crankshafts are passed through the lower blocks 2 (see FIG. 2) and are connected to the upper blocks 2, the blocks 2, 2' are withdrawn from the ingot and moves upward in relation to the cam 3 at a somewhat greater speed. Upon the blocks 2, 2' reaching the upper position, they begin to move downward at a uniform speed, equal to the speed of motion of the blocks 1, 1' of the bars. The blocks 2, 2 are thereby moved inwardly to contact the ingot being cast, which motion is eifected by the cam 10 through a system of connecting rods 13 and 14, and levers 18, 19 and 20. Then there occurs the moment of overlapping,

where both blocks of bars are against the ingot, thus permitting its extraction.

Thereafter, the blocks 1, 1' are withdrawn from the ingot by a system of connecting rods 11 and 12, and levers 15, 16 and 17 in the course of turning of the crankshafts 5 and 7, and the motion is continued downwards. Upon reaching its lower position, the blocks 1, 1 begin their upward motion, while the extraction of the ingot is efiected by the blocks 2, 2'. Further, the cycle of operation of the device is repeated.

The transmission of motion trom the common electric motor 22 and the system of connecting rods 11 to 14 and levers 15 to 20 provides for the synchronization of the reciprocal motion of the blocks 1 and 2, as well as the clamping of the ingot by the aid of said blocks and their withdrawal therefrom in a certain moment of time.

What is claimed is:

1. A device for drawing an ingot as it is cast from a curved mold of a continuous casting machine comprising: a drive shaft; two groups of first and second curvilinear walking blocks, one group on each side of the ingot to be withdrawn; a first rotatable cam mounted on said shaft to move said first walking blocks back and forth in the direction of withdrawal of the ingot; a second rotatable cam mounted on said shaft and arranged to be 180 out of phase with said first rotatable cam to move said second walking blocks back and forth in the direction of withdrawal of the ingot; and means driven by said shaft to move said first and said second walking blocks into contact with the billet when said walking blocks move in the direction of withdrawal of the ingot and to move said walking blocks out of contact with the ingot when moving in the direction contrary to the direction of withdrawal of the ingot.

2. The device of claim 1 in which said means to move said walking blocks into contact with the ingot and out of contact with the ingot include additional cams driven in synchronism with said first and second rotatable cams and crank means connected by means of connecting rods reciprocated by said cams, said connecting rods being of adjustable length.

3. The device of claim 2 in which a lever is pivoted at one end to be contacted With one of the additional cams, and one of said connecting rods is connected to the other end of said lever.

References Cited UNITED STATES PATENTS 2,895,190 7/1959 Bungeroth et al 164-282 J. SPENCER OVERHOLSER, Primary Examiner ROBERT D. BALDWIN, Assistant Examiner 

